[es6] Fix function context check for super and new.target

src/scopes.cc

Index: src/scopes.cc
diff --git a/src/scopes.cc b/src/scopes.cc
index a044b76baccc4c4b0d330aa0a749b5b022908610..6e1c18dc2e11b346c3c3e4914d58160a8027eb5c 100644
--- a/src/scopes.cc
+++ b/src/scopes.cc
@@ -763,24 +763,26 @@ int Scope::ContextChainLength(Scope* scope) {
 }
 
 
-Scope* Scope::ScriptScope() {
+Scope* Scope::DeclarationScope() {
   Scope* scope = this;
-  while (!scope->is_script_scope()) {
+  while (!scope->is_declaration_scope()) {
     scope = scope->outer_scope();
   }
   return scope;
 }
 
 
-Scope* Scope::DeclarationScope() {
+Scope* Scope::ReceiverScope() {
   Scope* scope = this;
-  while (!scope->is_declaration_scope()) {
+  while (!scope->is_script_scope() &&
+         (!scope->is_function_scope() || scope->is_arrow_scope())) {
     scope = scope->outer_scope();
   }
   return scope;
 }
 
 
+
 Handle<ScopeInfo> Scope::GetScopeInfo(Isolate* isolate) {
   if (scope_info_.is_null()) {
     scope_info_ = ScopeInfo::Create(isolate, zone(), this);